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91
Classified / Re: Looking for Power Transformer
« Last post by Kossandr on December 30, 2016, 10:29:24 pm »
It's a Solos, which is actually a hybrid tube preamp, solid state power. The later Solos II's were all solid state. But yeah, I think (from what I can gather from reading online) the power transformers Sunn used in their all tube amps were different.

Unless someone on here knows something different than what I've managed to uncover...
92
Classified / Re: Looking for Power Transformer
« Last post by _peter on December 30, 2016, 09:19:34 pm »
Oh, my bad, I thought you are looking for a tube amp transformer while the Solos is a transistor amp.

Then I can't help you, sorry.
93
Classified / Re: Looking for Power Transformer
« Last post by Kossandr on December 30, 2016, 05:44:48 pm »
I sure wish I could find some good documentation in these old parts :-)

The best I can tell from what I can find on the internet, the 28-2360 is a 60 watt power transformer. I can't find a good schematic the lists all the voltage outputs of it either. I know from testing a functional 28-2351 that it runs:


Blue: 260 vac
Red: 68 vac
Green: 6 vac (tube heaters)
Black: 120vac (input)

And from what I can tell the amp I'm trying to replace the PT in (a Sunn Solos) is an 80 watt amp. So I'm thinking the 28-2360 might not work.
94
Classified / Re: Looking for Power Transformer
« Last post by _peter on December 30, 2016, 04:50:07 pm »
Hi,

how about a 28-2360?

Best,
Peter
95
Classified / Looking for Power Transformer
« Last post by Kossandr on December 29, 2016, 08:17:58 pm »
Anyone by chance have an old 28-2350, or 28-2351 power transformer they'd be willing to part ways with? I need to replace a fried one in one of my Sun Solos.
96
Q & A / Re: Sunn Solo 1 help!
« Last post by Kossandr on December 27, 2016, 10:45:36 pm »
Good to know. You don't perchance have any left that you'd be willing to let go of do you? :-)

I've done searches on those part numbers and already contacted Western transformer to no avail. Sounds like my only chance on a replacement is getting mercury magnetics to tear down my fried one and rebuild a new one. Time to save my pennies for a while. Thanks for the help, I do appreciate it!
97
Q & A / Re: Sunn Solo 1 help!
« Last post by loudthud on December 27, 2016, 05:50:10 pm »
28-2350 is the Sunn part number. I purchased six transformers with that part number from Cascade Surplus in Portland back in the 70's.

Western Transformer was Sunn's transformer vendor located in Portland near the Ross Island Bridge. Most of their transformers have end bells painted with gold paint.
98
Q & A / Re: Sunn Solo 1 help!
« Last post by Kossandr on December 24, 2016, 11:48:00 am »
The power transformers on the two amps have similar but not exactly the same numbers. The fried one has the following markings:
WTC 1461
Oct 1970
28-2351

The working amplifier has the following markings on its transformer:
Western transformers, inc.
1417
28-2350
99
Q & A / Re: Sunn Solo 1 help!
« Last post by loudthud on December 23, 2016, 02:59:29 pm »
Kossandr, see if the power transformer has the numbers 28-2350 and 682036 stamped into the end bell.
100
Q & A / Re: Sunn Solo 1 help!
« Last post by Kossandr on December 23, 2016, 08:34:32 am »
Sorry, yes, they are Solos, but I was trying to differentiate them from the solos 2, which are a different amp altogether (all solid state, vs the Solos 1 being a tube pre-amp).

I've tried searching on every variation of the word solo(s) to find anything, but I've had no luck. Even the original sales brochures I've found online barely make any reference of them.
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